#include <stdio.h>
#include <unistd.h>
int main(){
    printf("i am main..., process start...\n");
    char* argv[10] = {NULL};
    argv[0] ="ls";
    argv[1] = "-l";
    int ret = execv("/bin/ls", argv);
    printf("if run here, execl failed : %d\n", ret);
    return 0;
}
